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Limit fuzzy searching to a depth of 10.

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Avoids choking when query string becomes long and there are excessively
long site name entries.
This commit is contained in:
Maarten Billemont
2020-05-23 12:14:22 -04:00
parent 7091e2ee1b
commit 8582c934c2
6 changed files with 51 additions and 53 deletions
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32
platform-darwin/Source/iOS/MPSitesViewController.m
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@@ -36,7 +36,7 @@ typedef NS_OPTIONS( NSUInteger, MPPasswordsTips ) {
@interface MPSitesViewController()<NSFetchedResultsControllerDelegate>
@property(nonatomic, strong) NSFetchedResultsController *fetchedResultsController;
@property(nonatomic, strong) NSArray *fuzzyGroups;
@property(nonatomic, strong) NSArray *queryGroups;
@property(nonatomic, strong) NSCharacterSet *siteNameAcceptableCharactersSet;
@property(nonatomic, strong) NSMutableArray<NSMutableArray *> *dataSource;
@property(nonatomic, weak) UIViewController *popdownVC;
@@ -162,7 +162,7 @@ typedef NS_OPTIONS( NSUInteger, MPPasswordsTips ) {
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
MPSiteCell *cell = [MPSiteCell dequeueFromCollectionView:collectionView indexPath:indexPath];
[cell setFuzzyGroups:self.fuzzyGroups];
[cell setQueryGroups:self.queryGroups];
id item = self.dataSource[(NSUInteger)indexPath.section][(NSUInteger)indexPath.item];
if ([item isKindOfClass:[MPSiteEntity class]])
[cell setSite:item animated:NO];
@@ -355,21 +355,19 @@ typedef NS_OPTIONS( NSUInteger, MPPasswordsTips ) {
- (void)reloadSites {
[self.fetchedResultsController.managedObjectContext performBlock:^{
static NSRegularExpression *fuzzyRE;
static dispatch_once_t once = 0;
dispatch_once( &once, ^{
fuzzyRE = [NSRegularExpression regularExpressionWithPattern:@"(.)" options:0 error:nil];
} );
NSString *queryString = self.query;
NSString *queryPattern = [[queryString stringByReplacingMatchesOfExpression:fuzzyRE withTemplate:@"*$1"]
stringByAppendingString:@"*"];
NSMutableArray *fuzzyGroups = [NSMutableArray new];
[fuzzyRE enumerateMatchesInString:queryString options:0 range:NSMakeRange( 0, queryString.length )
usingBlock:^(NSTextCheckingResult *result, NSMatchingFlags flags, BOOL *stop) {
[fuzzyGroups addObject:[queryString substringWithRange:result.range]];
}];
self.fuzzyGroups = fuzzyGroups;
NSMutableArray *queryGroups = [NSMutableArray new];
NSMutableString *queryPattern = [NSMutableString new];
[queryString enumerateSubstringsInRange: NSMakeRange(0, [queryString length]) options: NSStringEnumerationByComposedCharacterSequences
usingBlock: ^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop) {
if (substringRange.location < 10) {
[queryGroups addObject:substring];
[queryPattern appendString:@"*"];
}
[queryPattern appendString:substring];
}];
[queryPattern appendString:@"*"];
self.queryGroups = queryGroups;
NSError *error = nil;
self.fetchedResultsController.fetchRequest.predicate =
@@ -382,7 +380,7 @@ typedef NS_OPTIONS( NSUInteger, MPPasswordsTips ) {
toSections:[self createDataSource]
reloadItems:@[ MPTransientPasswordItem ] completion:^(BOOL finished) {
for (MPSiteCell *cell in self.collectionView.visibleCells)
[cell setFuzzyGroups:self.fuzzyGroups];
[cell setQueryGroups:self.queryGroups];
}];
} );
}];